B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material

B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents

B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features

B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered

B—PERFORMING OPERATIONS; TRANSPORTING

B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING

B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor

B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the choice of material

B—PERFORMING OPERATIONS; TRANSPORTING

B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING

B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor

B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons

Abstract

1335791 Blow-moulding multilayered bottles MITSUI PETROCHEMICAL INDUSTRIES Ltd 30 March 1972 [3 April 1971 12 Nov 1971 29 Feb 1972] 15114/72 Heading B5A [Also in Division B8] A blow-moulded bottle comprises at least one polyamide layer and at least one layer of a polyolefine to which has been grafted an ethylenically unsaturated carboxylic acid or an ester, amide, imide, or metal salt thereof. Maleic anhydride or acrylic acid are preferred graft monomers, and, in addition, styrene may be grafted to the polyolefin. The materials for the layers are extruded through concentric orifices so as to form concentric tubes which are bonded together and then blown. Preferably the two layers are coalesced within the die.